7 1/4 to 8 3/4 swap in A-body

dgc333 said
GotDart said

The shock plates will work if you elongate the holes. The inside dimension on the 7.25 u-bolts is 2 1/2", on the 8.75 it's 3" so you will need to elongate the holes 1/4" to the outside on each side. Been there done that and it works just fine.

Also, don't forget you will need to shorten the drive shaft about 1 1/2".


Thanks for all the info..... I will elongate the holes.....

This car currently is a 340/904/7.25 rear. So going to the 8 3/4 rear I will need about a 1 1/2 inch shorter driveshaft?